Synthesis of palladium complexes derived from imidazolidin‐2‐ylidene ligands and used for catalytic amination reactions

Abstract

N‐Aryl amination and the Buchwald–Hartwig reaction are of great synthetic and industrial interest and scientists accept their usefulness and versatility for obtaining arylamines. In this study Ag–N‐heterocyclic carbene complexes were used as transmetallation reagents for the synthesis of Pd–N‐heterocyclic carbene complexes. The new Pd–N‐heterocyclic carbene complexes were characterized using elemental analysis and 1H NMR, 13C NMR and infrared spectroscopies. The crystal structure of one, namely dichlorobis[1,3‐bis(2‐methylbenzyl)imidazolidin‐2‐yliden]palladium(II), is presented. The activity of the Pd(II) complexes in the coupling reaction of anilines or amines with bromobenzene was investigated. These complexes exhibited high catalytic activities in the direct synthesis of triarylamines and secondary amines in a single step. Copyright © 2016 John Wiley & Sons, Ltd.

L‐lysine‐Pd Complex Supported on Fe3O4MNPs: a novel recoverable magnetic nanocatalyst for Suzuki C‐C Cross‐Coupling reaction

“…[31,[103][104][105] In this regard, Glaser, Sonogashira, Ullmann, Stille, and Buchwald-Hartwig which are among the predominantly used reactions are catalyzed by metals. [23,31,[106][107][108] More specifically, palladium-catalyzed cross-coupling reactions have attracted much interest over the last 30 years, because they unlocked valuable organic coupling pathways, not solely in academia but also for industrial applications. [109][110][111][112] The opportunity for a tolerable functionalization of aryl halides with boronic acids, acetylenes or tin compounds is the practical advantage for the use of Suzuki, Mizoroki-Heck, Sonogashira, Stille and many other cross-coupling reactions.…”